1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/opto/idealKit.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,230 @@
1.4 +/*
1.5 + * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +//-----------------------------------------------------------------------------
1.29 +//----------------------------IdealKit-----------------------------------------
1.30 +// Set of utilities for creating control flow and scalar SSA data flow.
1.31 +// Control:
1.32 +// if_then(left, relop, right)
1.33 +// else_ (optional)
1.34 +// end_if
1.35 +// loop(iv variable, initial, relop, limit)
1.36 +// - sets iv to initial for first trip
1.37 +// - exits when relation on limit is true
1.38 +// - the values of initial and limit should be loop invariant
1.39 +// - no increment, must be explicitly coded
1.40 +// - final value of iv is available after end_loop (until dead())
1.41 +// end_loop
1.42 +// make_label(number of gotos)
1.43 +// goto_(label)
1.44 +// bind(label)
1.45 +// Data:
1.46 +// ConI(integer constant) - create an integer constant
1.47 +// set(variable, value) - assignment
1.48 +// value(variable) - reference value
1.49 +// dead(variable) - variable's value is no longer live
1.50 +// increment(variable, value) - increment variable by value
1.51 +// simple operations: AddI, SubI, AndI, LShiftI, etc.
1.52 +// Example:
1.53 +// Node* limit = ??
1.54 +// IdealVariable i(kit), j(kit);
1.55 +// declares_done();
1.56 +// Node* exit = make_label(1); // 1 goto
1.57 +// set(j, ConI(0));
1.58 +// loop(i, ConI(0), BoolTest::lt, limit); {
1.59 +// if_then(value(i), BoolTest::gt, ConI(5)) {
1.60 +// set(j, ConI(1));
1.61 +// goto_(exit); dead(i);
1.62 +// } end_if();
1.63 +// increment(i, ConI(1));
1.64 +// } end_loop(); dead(i);
1.65 +// bind(exit);
1.66 +//
1.67 +// See string_indexOf for a more complete example.
1.68 +
1.69 +class IdealKit;
1.70 +
1.71 +// Variable definition for IdealKit
1.72 +class IdealVariable: public StackObj {
1.73 + friend class IdealKit;
1.74 + private:
1.75 + int _id;
1.76 + void set_id(int id) { _id = id; }
1.77 + public:
1.78 + IdealVariable(IdealKit &k);
1.79 + int id() { assert(has_id(),"uninitialized id"); return _id; }
1.80 + bool has_id() { return _id >= 0; }
1.81 +};
1.82 +
1.83 +class IdealKit: public StackObj {
1.84 + friend class IdealVariable;
1.85 + // The main state (called a cvstate for Control and Variables)
1.86 + // contains both the current values of the variables and the
1.87 + // current set of predecessor control edges. The variable values
1.88 + // are managed via a Node [in(1)..in(_var_ct)], and the predecessor
1.89 + // control edges managed via a RegionNode. The in(0) of the Node
1.90 + // for variables points to the RegionNode for the control edges.
1.91 + protected:
1.92 + Compile * const C;
1.93 + PhaseGVN &_gvn;
1.94 + GrowableArray<Node*>* _pending_cvstates; // stack of cvstates
1.95 + GrowableArray<Node*>* _delay_transform; // delay invoking gvn.transform until drain
1.96 + Node* _cvstate; // current cvstate (control, memory and variables)
1.97 + uint _var_ct; // number of variables
1.98 + bool _delay_all_transforms; // flag forcing all transforms to be delayed
1.99 + Node* _initial_ctrl; // saves initial control until variables declared
1.100 + Node* _initial_memory; // saves initial memory until variables declared
1.101 +
1.102 + PhaseGVN& gvn() const { return _gvn; }
1.103 + // Create a new cvstate filled with nulls
1.104 + Node* new_cvstate(); // Create a new cvstate
1.105 + Node* cvstate() { return _cvstate; } // current cvstate
1.106 + Node* copy_cvstate(); // copy current cvstate
1.107 + void set_ctrl(Node* ctrl) { _cvstate->set_req(TypeFunc::Control, ctrl); }
1.108 +
1.109 + // Should this assert this is a MergeMem???
1.110 + void set_all_memory(Node* mem){ _cvstate->set_req(TypeFunc::Memory, mem); }
1.111 + void set_memory(Node* mem, uint alias_idx );
1.112 + void do_memory_merge(Node* merging, Node* join);
1.113 + void clear(Node* m); // clear a cvstate
1.114 + void stop() { clear(_cvstate); } // clear current cvstate
1.115 + Node* delay_transform(Node* n);
1.116 + Node* transform(Node* n); // gvn.transform or push node on delay list
1.117 + Node* promote_to_phi(Node* n, Node* reg);// Promote "n" to a phi on region "reg"
1.118 + bool was_promoted_to_phi(Node* n, Node* reg) {
1.119 + return (n->is_Phi() && n->in(0) == reg);
1.120 + }
1.121 + void declare(IdealVariable* v) { v->set_id(_var_ct++); }
1.122 + // This declares the position where vars are kept in the cvstate
1.123 + // For some degree of consistency we use the TypeFunc enum to
1.124 + // soak up spots in the inputs even though we only use early Control
1.125 + // and Memory slots. (So far.)
1.126 + static const uint first_var; // = TypeFunc::Parms + 1;
1.127 +
1.128 +#ifdef ASSERT
1.129 + enum State { NullS=0, BlockS=1, LoopS=2, IfThenS=4, ElseS=8, EndifS= 16 };
1.130 + GrowableArray<int>* _state;
1.131 + State state() { return (State)(_state->top()); }
1.132 +#endif
1.133 +
1.134 + // Users should not care about slices only MergedMem so no access for them.
1.135 + Node* memory(uint alias_idx);
1.136 +
1.137 + public:
1.138 + IdealKit(PhaseGVN &gvn, Node* control, Node* memory, bool delay_all_transforms = false);
1.139 + ~IdealKit() {
1.140 + stop();
1.141 + drain_delay_transform();
1.142 + }
1.143 + // Control
1.144 + Node* ctrl() { return _cvstate->in(TypeFunc::Control); }
1.145 + Node* top() { return C->top(); }
1.146 + MergeMemNode* merged_memory() { return _cvstate->in(TypeFunc::Memory)->as_MergeMem(); }
1.147 + void set(IdealVariable& v, Node* rhs) { _cvstate->set_req(first_var + v.id(), rhs); }
1.148 + Node* value(IdealVariable& v) { return _cvstate->in(first_var + v.id()); }
1.149 + void dead(IdealVariable& v) { set(v, (Node*)NULL); }
1.150 + void if_then(Node* left, BoolTest::mask relop, Node* right,
1.151 + float prob = PROB_FAIR, float cnt = COUNT_UNKNOWN,
1.152 + bool push_new_state = true);
1.153 + void else_();
1.154 + void end_if();
1.155 + void loop(IdealVariable& iv, Node* init, BoolTest::mask cmp, Node* limit,
1.156 + float prob = PROB_LIKELY(0.9), float cnt = COUNT_UNKNOWN);
1.157 + void end_loop();
1.158 + Node* make_label(int goto_ct);
1.159 + void bind(Node* lab);
1.160 + void goto_(Node* lab, bool bind = false);
1.161 + void declares_done();
1.162 + void drain_delay_transform();
1.163 +
1.164 + Node* IfTrue(IfNode* iff) { return transform(new (C,1) IfTrueNode(iff)); }
1.165 + Node* IfFalse(IfNode* iff) { return transform(new (C,1) IfFalseNode(iff)); }
1.166 +
1.167 + // Data
1.168 + Node* ConI(jint k) { return (Node*)gvn().intcon(k); }
1.169 + Node* makecon(const Type *t) const { return _gvn.makecon(t); }
1.170 +
1.171 + Node* AddI(Node* l, Node* r) { return transform(new (C,3) AddINode(l, r)); }
1.172 + Node* SubI(Node* l, Node* r) { return transform(new (C,3) SubINode(l, r)); }
1.173 + Node* AndI(Node* l, Node* r) { return transform(new (C,3) AndINode(l, r)); }
1.174 + Node* MaxI(Node* l, Node* r) { return transform(new (C,3) MaxINode(l, r)); }
1.175 + Node* LShiftI(Node* l, Node* r) { return transform(new (C,3) LShiftINode(l, r)); }
1.176 + Node* CmpI(Node* l, Node* r) { return transform(new (C,3) CmpINode(l, r)); }
1.177 + Node* Bool(Node* cmp, BoolTest::mask relop) { return transform(new (C,2) BoolNode(cmp, relop)); }
1.178 + void increment(IdealVariable& v, Node* j) { set(v, AddI(value(v), j)); }
1.179 + void decrement(IdealVariable& v, Node* j) { set(v, SubI(value(v), j)); }
1.180 +
1.181 + Node* CmpL(Node* l, Node* r) { return transform(new (C,3) CmpLNode(l, r)); }
1.182 +
1.183 + // TLS
1.184 + Node* thread() { return gvn().transform(new (C, 1) ThreadLocalNode()); }
1.185 +
1.186 + // Pointers
1.187 + Node* AddP(Node *base, Node *ptr, Node *off) { return transform(new (C,4) AddPNode(base, ptr, off)); }
1.188 + Node* CmpP(Node* l, Node* r) { return transform(new (C,3) CmpPNode(l, r)); }
1.189 +#ifdef _LP64
1.190 + Node* XorX(Node* l, Node* r) { return transform(new (C,3) XorLNode(l, r)); }
1.191 +#else // _LP64
1.192 + Node* XorX(Node* l, Node* r) { return transform(new (C,3) XorINode(l, r)); }
1.193 +#endif // _LP64
1.194 + Node* URShiftX(Node* l, Node* r) { return transform(new (C,3) URShiftXNode(l, r)); }
1.195 + Node* ConX(jint k) { return (Node*)gvn().MakeConX(k); }
1.196 + Node* CastPX(Node* ctl, Node* p) { return transform(new (C,2) CastP2XNode(ctl, p)); }
1.197 + // Add a fixed offset to a pointer
1.198 + Node* basic_plus_adr(Node* base, Node* ptr, intptr_t offset);
1.199 +
1.200 + // Memory operations
1.201 +
1.202 + // This is the base version which is given an alias index.
1.203 + Node* load(Node* ctl,
1.204 + Node* adr,
1.205 + const Type* t,
1.206 + BasicType bt,
1.207 + int adr_idx,
1.208 + bool require_atomic_access = false);
1.209 +
1.210 + // Return the new StoreXNode
1.211 + Node* store(Node* ctl,
1.212 + Node* adr,
1.213 + Node* val,
1.214 + BasicType bt,
1.215 + int adr_idx,
1.216 + bool require_atomic_access = false);
1.217 +
1.218 + // Store a card mark ordered after store_oop
1.219 + Node* storeCM(Node* ctl,
1.220 + Node* adr,
1.221 + Node* val,
1.222 + Node* oop_store,
1.223 + BasicType bt,
1.224 + int adr_idx);
1.225 +
1.226 + // Trivial call
1.227 + void make_leaf_call(const TypeFunc *slow_call_type,
1.228 + address slow_call,
1.229 + const char *leaf_name,
1.230 + Node* parm0,
1.231 + Node* parm1 = NULL,
1.232 + Node* parm2 = NULL);
1.233 +};
